3 years ago

2 reasons why recycling aluminium is a good idea

Chemistry

2 answers:

RideAnS [48]3 years ago

8 0

Answer:

1. it saves energy, time, money and precious natural resources

2. it generates jobs and helps to pay for community services that make life better for millions of people.

Explanation:

Mazyrski [523]3 years ago

7 0

Answer:

Recycling aluminium saves around 95% of the energy needed to make the metal from raw materials. Along with the energy savings, recycling aluminium saves around 95% of the greenhouse gas emissions compared to the 'primary' production process.

Explanation:

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A jet airplane reaches 750 km/h on a certain flight. What distance does it cover in <br> 10 min?

malfutka [58]

The distance that jet covered in 10 min is 125 Km

calculation

distance = speed x time

speed=750 km/h

time= 10/60hrs

=750 x10/60=125 Km

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3 years ago

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Which property of fossil fuel make them an important resource for life on earth

grandymaker [24]

Fossil Fuels give off energy when they are burned

One valuable fossil fuel is natural gas. It is a cleaner-burning fuel source.

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2 years ago

In a colloid, solution, or suspension, particles are dispersed throughout the mixture. What is the order of these three types of

a_sh-v [17]

1) solution
2) colloid
3) suspension

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3 years ago

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3: Consider molecules of hydrogen (tiny ones) and oxygen (bigger ones) in a gas mixture. If they have the same average kinetic e

mezya [45]

Answer: Hydrogen molecules will have greatest average speed.

Explanation:

The formula for average speed is :

$\mu_{av}={\sqrt{\frac{8RT}{\pi\times M}}}$

R = gas constant

T = temperature

M = Molecular Mass

Now putting all the values:

$\frac{\nu_{H_2}}{\nu_{O_2}}=\sqrt{\frac{8RT}{\pi\times M_{H_2}}}/{\sqrt{\frac{8RT}{\pi\times M_{O_2}}}$

$\frac{\nu_{H_2}}{\nu_{O_2}}=\sqrt{\frac{16}{2}}$

$\frac{\nu_{av}_{H_2}}{\nu_{av}_{O_2}}=8$

Thus average speed of hydrogen is 8 times the average speed of oxygen. Thus hydrogen molecules will have greatest average speed

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2 years ago

The first-order rate constant for the decomposition of n2o5, 2n2o5(g)→4no2(g)+o2(g) at 70∘c is 6.82×10−3 s−1. suppose we start w

torisob [31]

The rate constant for 1st order reaction is

K = (2.303 /t) log (A0 /A)

Where, k is rate constant

t is time in sec

A0 is initial concentration

(6.82 * 10-3) * 240 = log (0.02 /A)

1.63 = log (0.02 /A)

-1.69 – log A = 1.63

Log A = - 0.069

A = 0.82

Hence, 0.82 mol of A remain after 4 minutes.

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3 years ago